CN114992697B - Cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system and control method - Google Patents

Cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system and control method Download PDF

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CN114992697B
CN114992697B CN202210606972.XA CN202210606972A CN114992697B CN 114992697 B CN114992697 B CN 114992697B CN 202210606972 A CN202210606972 A CN 202210606972A CN 114992697 B CN114992697 B CN 114992697B
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water
heating
hot water
heat
pipeline
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CN114992697A (en
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周吉日
李沛林
杨汉林
朱发东
赵中华
杨凯
牛智祥
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China MCC5 Group Corp Ltd
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China MCC5 Group Corp Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D12/00—Other central heating systems
    • F24D12/02—Other central heating systems having more than one heat source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00—Arrangements for storing heat collected by solar heat collectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/14—Solar energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The invention provides a cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system and a control method, wherein the cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system comprises a solar hot water type collector array; the seasonal heat storage water tank is communicated with the solar hot water type heat collector array; a heating hot water heat exchanger group; the pressure-bearing closed hot water tank is communicated with the second heating hot water heat exchanger and the underground water taking system; the water source heat pump unit is provided with a low-grade end and a high-grade end. According to the invention, the heat storage solar energy of the cross-season water-saving pool and the water source heat pump are integrated for heating, so that a high-efficiency and rapid heating process is realized, the full utilization of low-grade heat energy in the cross-season water-saving pool is ensured, the heating requirement of a user is met, and the energy consumption is reduced to the greatest extent; the automatic operation of the system is realized, the workload of operation maintenance personnel is reduced, and the operation accidents caused by manual misoperation are greatly reduced.

Description

Cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system and control method
Technical Field
The invention relates to the technical field of cross-season heat supply, in particular to a cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system and a control method.
Background
Solar heating is widely applied to a large number of practical projects in all places of the country, wherein cross-season water-saving tank heat storage solar heating can effectively solve the defects of mismatching of supply and demand in time and space and intermittence of solar energy, and the system is simpler and has lower investment, so that the solar heating becomes the focus of research in recent years, but the solar heating still cannot meet the total heating requirements in winter of application projects, and auxiliary heat sources still need to be operated in part of time. The solar energy and water (ground) source heat pump two renewable energy utilization technologies are effective means for building electromechanical operation, maintenance and energy conservation, and double green coupling utilization of the two technologies also becomes a research hot spot.
However, in the prior art, solar energy stored in a cross-season water-saving pool is usually used separately from a water (ground) source heat pump, low-temperature hot water in heat storage of the cross-season water-saving pool cannot be effectively utilized, and therefore a separate heating system cannot meet the requirement of low carbon to the maximum extent;
secondly, in a system of coupling heat storage solar energy of a part of cross-season water-saving pool and a water (ground) source heat pump, a control logic or a control method is lacked, so that a great amount of poor energy-saving effect and even cross-season water-saving pool heat storage solar energy heating faults occur in practical engineering application, for example: the anti-freezing protection logic is improper, the operation water temperature is too low to cause frost heaving damage of the heat collecting pipe network and the equipment, and the operation water temperature is too high to cause low heat collecting efficiency and even water evaporation in the heat collector; the incorrect switching of the water (ground) source heat pump during heating can cause the problems of excessively high energy consumption, poor comfort for users and the like.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art.
Therefore, the first aspect of the invention provides a cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system.
The second aspect of the invention provides a cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating control method.
The invention provides a cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system, which comprises:
a solar hot water collector array;
the seasonal heat storage water tank is communicated with the solar hot water type heat collector array;
the heating hot water heat exchanger group is communicated with the cross-season hot water pool, and at least comprises a first heating hot water heat exchanger and a second heating hot water heat exchanger which are communicated with each other;
the pressure-bearing closed hot water tank is communicated with the second heating hot water heat exchanger and the underground water taking system;
the water source heat pump unit is provided with a low-grade end and a high-grade end, the water inlet of the low-grade end is communicated with the pressure-bearing closed hot water tank, and the water outlet is communicated with the switchable second heating hot water heat exchanger or the groundwater backwater; the water inlet of the high-grade end is communicated with the switchable first heating hot water heat exchanger or heating backwater, and the water outlet is communicated with a heating pipeline so as to provide heating hot water for a user.
According to the technical scheme, the cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system can also have the following additional technical characteristics:
in the above technical scheme, the top of the cross-season heat storage pool is provided with a top temperature sensor and a pool liquid level sensor, and the bottom of the cross-season heat storage pool is provided with a bottom temperature sensor.
In the technical scheme, the cross-season heat storage water tank is provided with a water supplementing pipeline, and the water supplementing pipeline is provided with a variable-frequency constant-pressure water supplementing pump and water supplementing equipment for supplementing a water source for the cross-season heat storage water tank.
In the above technical scheme, the solar hot water collector array and the cross-season heat storage pool are provided with:
one end of the water inlet pipeline of the solar hot water collector is communicated with the water inlet of the solar hot water collector array, the other end of the water inlet pipeline of the solar hot water collector is communicated with the cross-season heat storage water tank, two branch pipelines are arranged at the joint of the water inlet pipeline of the solar hot water collector and the cross-season heat storage water tank, and one of the branch pipelines is provided with a normally open electromagnetic valve so as to prevent ineffective heat collection of the solar hot water collector array or frost cracking at night; the other branch pipeline is provided with a heat collection circulating pump so as to convey the water in the seasonal heat storage water tank to the solar hot water type heat collector array for heating;
One end of the water outlet pipeline of the solar hot water type heat collector is communicated with the water outlet of the solar hot water type heat collector array, and the other end of the water outlet pipeline is communicated with the water inlet of the cross-season heat storage water tank so as to convey the hot water heated by the solar hot water type heat collector to the cross-season heat storage water tank;
the solar hot water type collector comprises a solar hot water type collector array, a solar hot water type collector water inlet pipeline, a solar hot water type collector water outlet pipeline, a solar hot water type collector water inlet pipeline and a solar hot water type collector water outlet pipeline, wherein the solar hot water type collector water inlet pipeline is provided with a collector water inlet temperature sensor for monitoring the water inlet temperature of the solar hot water type collector array, and the solar hot water type collector water outlet pipeline is provided with a collector water outlet temperature sensor for monitoring the water outlet temperature of the solar hot water type collector array; and
an in-board temperature sensor is arranged in the solar hot water type heat collector array so as to monitor the temperature inside the solar hot water type heat collector array.
In the above technical scheme, the cross-season heat storage pool and the heating hot water heat exchanger group are provided with:
one end of the water tank water outlet pipeline is communicated with the cross-season heat storage water tank, and the other end of the water tank water outlet pipeline is communicated with the first heating hot water heat exchanger so as to convey water in the cross-season heat storage water tank into the first heating hot water heat exchanger;
one end of the water inlet pipeline of the water tank is communicated with the cross-season heat storage water tank, and the other end of the water inlet pipeline of the water tank is communicated with the second heating hot water heat exchanger;
The water tank water outlet pipeline is provided with a water tank water outlet temperature sensor and a hot water heat exchange circulating pump, and the water tank water inlet pipeline is provided with a water tank water inlet temperature sensor.
In the above aspect, the first heating hot water heat exchanger includes:
one end of the first heating hot water heat exchange water outlet pipeline is communicated with the first heating hot water heat exchanger, the other end of the first heating hot water heat exchange water outlet pipeline is communicated with the high-grade end water inlet of the water source heat pump unit, and the first heating hot water heat exchange water outlet pipeline is communicated with the water supplementing pipeline through a connecting pipeline;
one end of the first heating hot water heat exchange water inlet pipeline is communicated with the first heating hot water heat exchanger, and the other end of the first heating hot water heat exchange water inlet pipeline is communicated with heating backwater; and
the first heating hot water heat exchange water outlet pipeline is communicated with the first heating hot water heat exchange water inlet pipeline through a communication pipeline;
the first heating hot water heat exchange water outlet pipeline is sequentially provided with a first heating hot water heat exchange water outlet temperature sensor, a pressure sensor, a heating system circulating pump, a water source heat pump water inlet temperature sensor and a flow sensor;
the first heating hot water heat exchange water inlet pipeline is provided with a first heating hot water heat exchange water inlet temperature sensor and a first electromagnetic valve; and
The communication pipeline is provided with a second electromagnetic valve.
In the above aspect, the second heating hot water heat exchanger includes:
one end of the second heating hot water heat exchange water outlet pipeline is communicated with the second heating hot water heat exchanger, and the other end of the second heating hot water heat exchange water outlet pipeline is communicated with the pressure-bearing closed hot water tank;
one end of the second heating hot water heat exchange water inlet pipeline is communicated with the second heating hot water heat exchanger, and the other end of the second heating hot water heat exchange water inlet pipeline is communicated with low-grade end water outlet of the water source heat pump unit;
the second heating hot water heat exchange water outlet pipeline is sequentially provided with a second heating hot water heat exchange water outlet temperature sensor and a heating intermediate circulating pump;
the second heating hot water heat exchange water inlet pipeline is sequentially provided with a second heating hot water heat exchange water inlet temperature sensor, a third electromagnetic valve and a fourth electromagnetic valve.
In the above technical scheme, the pressure-bearing closed hot water tank further has:
one end of the underground water taking pipeline is communicated with the pressure-bearing closed hot water tank, and the other end of the underground water taking pipeline is communicated with underground water taking;
one end of the water tank communication pipeline is communicated with the pressure-bearing closed hot water tank, and the other end of the water tank communication pipeline is communicated with the low-grade end water inlet of the water source heat pump unit;
wherein, the groundwater water intake pipeline is provided with a water source side water pump;
The water tank communication pipeline is provided with a water tank outlet water temperature sensor;
a water temperature sensor is arranged in the pressure-bearing closed hot water tank.
In the above technical solution, the heating pipeline is provided with a heating and water supply temperature sensor.
The invention also provides a cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating control method, which is applied to the cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system in any one of the technical schemes, and comprises the following steps:
starting and controlling the water source heat pump unit:
1.1 judging whether the water source heat pump unit meets the starting requirement: setting the starting time point of the water source heat pump as T1 (the ground heating is started 1 hour in advance according to the use time of a user, and other heating modes are started 0.5 hour in advance), setting the stopping time point as T2 (the time when the user closes the heating), judging that the water source heat pump unit reaches one of starting conditions when the time (namely the time when the system is required to operate) is between T1 and T2, and judging that the water source heat pump unit completely reaches the starting condition if the water outlet temperature of the first heating hot water heat exchanger is lower than 55 ℃ and the duration time is 60 s;
the system is provided with the following three-stage heating pipelines:
The first-stage heating pipeline is used for heating water in a cross-season heat storage pool by the solar hot water collector array, conveying the heated water into the first heating hot water heat exchanger, closing a heating intermediate circulation pump at the moment, conveying the hot water to a water source heat pump unit (the water source heat pump unit does not work at the moment, namely the water source heat pump unit is equivalent to a communicated pipeline) through the first heating hot water heat exchanger, and directly supplying the hot water to a user through the heating pipeline by the water source heat pump unit;
the second-stage heat supply pipeline is characterized in that the water inlet at the low-grade end (the left side port of the water source heat pump unit in fig. 1) of the water source heat pump unit is low-temperature water of a cross-season heat storage pool, and the specific process is as follows: the low-temperature water of the cross-season heat storage water tank enters a second heating hot water heat exchanger, the second heating hot water heat exchanger conveys water to a pressure-bearing closed hot water tank (at the moment, a heating intermediate circulating pump is started), and then enters the water source heat pump unit from a low-grade end water inlet of the water source heat pump unit. The water inlet at the high-grade end (the right side end port of the water source heat pump unit in fig. 1) of the water source heat pump unit is heating circulating water, and the specific process is as follows: the first electromagnetic valve is closed, the second electromagnetic valve is opened, heating circulating water enters the second half of the first heating hot water heat exchange water outlet pipeline through the communication pipeline, and finally enters the water source heat pump unit through the high-grade end (the right side port of the water source heat pump unit in fig. 1). The water source heat pump unit is used for supplying the heat of the low-temperature water to the heating circulating water for heat exchange, and the heating circulating water is supplied to a user through a heating pipeline after being heated (namely, the grade is improved through the water source heat pump unit);
The third-stage heating pipeline is characterized in that the water inlet at the low-grade end (the left side port of the water source heat pump unit in fig. 1) of the water source heat pump unit is groundwater, and the concrete process is as follows: the underground water intake pipeline extracts underground water to the pressure-bearing closed hot water tank, and then enters the water source heat pump unit through the low-grade end water inlet of the water source heat pump unit. The water inlet at the high-grade end (the right side end port of the water source heat pump unit in fig. 1) of the water source heat pump unit is still heating circulating water, and the specific process is the same as that of the second-stage heating pipeline. The water source heat pump unit is used for supplying heat to the heating circulating water for heat exchange by drawing heat of the underground water, and the heating circulating water is supplied to a user through a heating pipeline after being heated (namely, the grade of the heating circulating water is improved through the water source heat pump unit).
Therefore, when the system meets the requirement (hot water meets the heating requirement) and the first-stage heating pipeline is started, the water source heat pump unit is not required to be started at the moment, and only when the second-stage heating pipeline and the third-stage heating pipeline are started, whether the water source heat pump unit meets the starting requirement or not, namely, the purpose of 1.1 is required to be judged.
1.2 when the water source heat pump unit meets the starting condition, the unit operation is controlled to be increased or decreased according to the following requirements:
sampling and detecting the flow and the inlet water temperature of hot water through a flow sensor of a first heating hot water heat exchange water outlet pipeline and an inlet water temperature sensor of a high-grade end of a water source heat pump; the outlet water temperature of the hot water is sampled and detected by a heating water supply temperature sensor of a heating pipeline. Based on the three samples, heating load calculation is performed:
When the heating load demand is greater than the maximum load provided by the hot water unit and the duration of the state reaches 10-15 minutes, another water source heat pump is put in; when the calculation result shows that the maximum load provided by the residual unit after one water source heat pump is reduced can meet the load requirement, and the duration of the state reaches 10-15 minutes, one water source heat pump is stopped;
1.3 when the first heating hot water heat exchange water outlet temperature sensor of the first heating hot water heat exchange water outlet pipeline monitors that the water outlet temperature is greater than 55 ℃ and the duration is 300S, the first electromagnetic valve of the first heating hot water heat exchange water inlet pipeline is opened, the second electromagnetic valve of the communication pipeline is closed, at the moment, the heating intermediate circulating pump is closed, and the water source heat pump unit is closed. At the moment, the heating heat required by the user is provided by the cross-season heat storage water tank, namely, a first-stage heating pipeline is started;
1.4 when the water outlet temperature sensor of the water outlet pipeline of the water tank monitors that the water outlet temperature is less than 55 ℃ and the duration time is 300S, the second electromagnetic valve is opened, the first electromagnetic valve is closed, and under any condition, the first electromagnetic valve and the second electromagnetic valve are not simultaneously opened or closed, and the water source heat pump unit judges whether to start according to the requirement of 1.1;
Secondly, controlling the heat collection circulating pump and the normally open electromagnetic valve:
setting the starting time point of the heat collection circulating pump as T3 (0.5 hour after the local sunrise time is delayed), setting the stopping time point of the heat collection circulating pump as T4 (0.5 hour in advance according to the local sunset time), wherein the time (namely the time required for the system to operate) is between T3 and T4, and when the temperature detected by an in-board temperature sensor is greater than 55 ℃ and the duration is 300s, starting the heat collection circulating pump, and closing a normally open electromagnetic valve after the time delay is 10 s;
when the time is between T3 and T4, the water inlet temperature detected by the water inlet temperature sensor of the heat collector is higher than the water outlet temperature detected by the water outlet temperature sensor of the heat collector, and the duration time is 300s, the heat collection circulating pump is closed, and meanwhile, the normally open electromagnetic valve is opened. When the temperature detected by the temperature sensor in the plate is higher than 55 ℃ and the duration time is 300s, the circulating water pump is started again;
and when the time is longer than T4 or the temperature detected by the temperature sensor in the plate is lower than 30 ℃, stopping the heat collection circulating pump and opening the normally open electromagnetic valve. The normally open electromagnetic valve is interlocked with the heat collection circulating pump, namely, the normally open electromagnetic valve and the heat collection circulating pump are not simultaneously opened or not simultaneously closed;
the variable frequency of the heat collection circulating pump is proportionally controlled according to the water supply and return temperature difference between the water outlet temperature sensor of the heat collector and the water inlet temperature sensor of the heat collector and the performance curve of the water pump.
Third, control of the variable-frequency constant-pressure water supplementing pump:
maintaining the pressure of the circulating pump inlet of the heating system constant (monitoring through a pressure sensor), and ensuring the water level of the heat storage water tank in a cross-season mode according to the water level detected by the water tank liquid level sensor (namely, supplementing water through water supplementing equipment, wherein the water supplementing equipment can be an external water supplementing pipeline and the like, when the water level detected by the water tank liquid level sensor is lower than a set value, the water tank liquid level sensor transmits a signal to a variable-frequency constant-pressure water supplementing pump, and the variable-frequency constant-pressure water supplementing pump starts water supplementing until the water level reaches the set value);
fourthly, controlling a heating heat exchange circulating pump:
when the temperature monitored by the top temperature sensor of the cross-season heat storage pool is higher than 30 ℃ and the temperature monitored by the bottom temperature sensor is higher than 20 ℃, if the heating system circulating pump is already running, starting the hot water heat exchange circulating pump;
at the moment, when the temperature monitored by the water inlet temperature sensor of the cross-season heat storage pool is higher than the temperature monitored by the water outlet temperature sensor of the water tank and lasts for 300 seconds, the hot water heat exchange circulating pump is stopped; when the system meets the starting condition, restarting the hot water heat exchange circulating pump; the variable frequency of the hot water heat exchange circulating pump is proportionally controlled according to the difference value between the temperature monitored by the water tank inlet temperature sensor and the temperature monitored by the water tank outlet temperature sensor and the performance curve of the water pump;
Fifth, control of the heating intermediate circulation pump:
when the time is between T1 and T2 and the first solenoid valve is closed, the heating intermediate circulation pump is started.
When the water supply temperature monitored by the second heating hot water heat exchange water outlet temperature sensor is smaller than the water outlet temperature monitored by the pressure-bearing closed hot water outlet temperature sensor, the duration is 300S; or stopping the heating intermediate circulation pump when the temperature monitored by the water temperature sensor in the pressure-bearing closed hot water tank is lower than 20 ℃ and lasts for 60 seconds;
when the system meets the starting condition, restarting the heating intermediate circulation pump; the variable frequency of the heating intermediate circulating pump is proportionally controlled according to the difference value between the temperature sensor and the performance curve of the water pump;
sixth, control of water source side water pump:
when the temperature monitored by a water temperature sensor in the pressure-bearing closed hot water tank is lower than 20 ℃ and lasts for 60 seconds, the water source side water pump is started, and meanwhile, the heating intermediate circulating pump is closed; the third electromagnetic valve is started and stopped in linkage with the heating intermediate circulating pump; the fourth electromagnetic valve is started and stopped in linkage with the water pump at the water source side; the heating intermediate circulation pump and the water source side water pump are not started at the same time.
Compared with the prior art, the cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system and the control method have the following beneficial effects:
1. The cross-season water-saving pool heat storage solar energy and water source heat pump coupled heating system integrates the cross-season water-saving pool heat storage solar energy and water source heat pump coupled heating, so that an efficient and rapid heating process is realized, and the heating requirement of a user is ensured;
2. the cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating control method provided by the invention realizes automatic operation of the system, reduces the workload of operation maintenance personnel, and greatly reduces operation accidents caused by manual misoperation;
3. the cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating control method provided by the invention enables the system to have a perfect automatic control system, and the operation working condition of the circulating water pump can be changed according to the temperature of the water tank and the temperature in the solar heat collector, so that the conversion of the working conditions of solar heat storage, heat stopping, heat consumption and freeze prevention is realized;
4. the cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating control method provided by the invention can furthest improve the solar energy guarantee rate, reduce the operation energy consumption under the condition of ensuring the comfort of users, and improve the utilization and storage efficiency of solar energy;
5. the risk of tube cracking caused by frost heaving, vaporization and the like is reduced, and safe and stable operation is ensured.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of the connection of a cross-season water conservation pool heat storage solar energy and water source heat pump coupled heating system of the invention;
FIG. 2 is an enlarged view of area A of FIG. 1;
fig. 3 is an enlarged view of region B of fig. 1.
The correspondence between the reference numerals and the component names in fig. 1 to 3 is:
1. a solar hot water collector array; 2. a cross-season heat storage pool; 3. a heating hot water heat exchanger group; 301. a first heating hot water heat exchanger; 302. a second heating hot water heat exchanger; 4. pressure-bearing closed hot water tank; 5. a water source heat pump unit; 6. a heating pipeline; 7. a top temperature sensor; 8. a pool level sensor; 9. a bottom temperature sensor; 10. a water supplementing pipeline; 11. variable-frequency constant-pressure water supplementing pump; 12. A water replenishing device; 13. the solar hot water type collector is provided with a water inlet pipeline; 14. a normally open solenoid valve; 15. a heat collecting circulation pump; 16. an outlet pipeline of the solar hot water type heat collector; 17. a water inlet temperature sensor of the heat collector; 18. a water outlet temperature sensor of the heat collector; 19. an in-board temperature sensor; 20. a water outlet pipeline of the water tank; 21. a water inlet pipeline of the water tank; 22. a water outlet temperature sensor of the water tank; 23. a hot water heat exchange circulating pump; 24. a water tank inlet water temperature sensor; 25. a first heating hot water heat exchange water outlet pipeline; 26. a connecting pipeline; 27. a first heating hot water heat exchange water inlet pipeline; 28. a communication pipeline; 29. a first heating hot water heat exchange outlet water temperature sensor; 30. a pressure sensor; 31. a heating system circulation pump; 32. a water source heat pump water inlet temperature sensor; 33. a flow sensor; 34. a first electromagnetic valve; 35. a second electromagnetic valve; 36. a second heating hot water heat exchange water outlet pipeline; 37. the second heating hot water heat exchange water inlet pipeline; 38. a second heating hot water heat exchange outlet water temperature sensor; 39. a heating intermediate circulation pump; 40. a second heating hot water heat exchange inlet water temperature sensor; 41. a third electromagnetic valve; 42. a fourth electromagnetic valve; 43. groundwater water taking pipeline; 44. the water tank is communicated with the pipeline; 45. a water source side water pump; 46. a pressure-bearing closed hot water outlet temperature sensor; 47. a water temperature sensor; 48. a heating and water supply temperature sensor; 49. the first heating hot water heat exchange inlet water temperature sensor.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
The following describes a cross-season water conservation pool heat storage solar energy and water source heat pump coupled heating system and a control method according to some embodiments of the present application with reference to fig. 1 to 3.
Some embodiments of the application provide a cross-season water saving pool heat storage solar energy and water source heat pump coupled heating system.
As shown in fig. 1 to 3, a first embodiment of the present application provides a cross-season water saving pool heat storage solar energy and water source heat pump coupled heating system, comprising:
a solar hot water type collector array 1;
a cross-season heat storage pool 2 communicated with the solar hot water type heat collector array 1;
A heating hot water heat exchanger group 3 communicated with the cross-season hot water tank, wherein the heating hot water heat exchanger group 3 at least comprises a first heating hot water heat exchanger 301 and a second heating hot water heat exchanger 302 which are communicated with each other;
a pressure-bearing closed hot water tank 4 communicated with the second heating hot water heat exchanger 302 and a groundwater system;
the water source heat pump unit 5 is provided with a low-grade end and a high-grade end, the water inlet of the low-grade end is communicated with the pressure-bearing closed hot water tank 4, and the water outlet is communicated with the switchable second heating hot water heat exchanger 302 or groundwater backwater; the inlet water of the high-grade end is communicated with the first heating hot water heat exchanger 301 or the heating return water which can be switched, and the outlet water is communicated with the heating pipeline 6 so as to provide heating hot water for users.
In the embodiment, the solar hot water type collector array 1, the cross-season heat storage pool 2 and the water source heat pump unit 5 are coupled, so that heat storage solar energy of the cross-season water storage pool and the water source heat pump are integrated for heating, an efficient and rapid heating process is realized, and the heating requirement of a user is ensured.
The second embodiment of the invention provides a cross-season water-saving pool heat storage solar energy and water source heat pump coupled heating system, and on the basis of the first embodiment, the top of the cross-season heat storage pool 2 is provided with a top temperature sensor 7 and a pool liquid level sensor 8, and the bottom of the cross-season heat storage pool is provided with a bottom temperature sensor 9.
In this embodiment, the top temperature sensor 7 is used to monitor the top temperature of the cross-season thermal storage water tank 2, the water tank level sensor 8 is used to monitor the water level of the cross-season thermal storage water tank 2, and the bottom temperature sensor 9 is used to monitor the bottom temperature of the cross-season thermal storage water tank 2.
The third embodiment of the present invention provides a heat storage solar energy and water source heat pump coupled heating system for a cross-season water saving pool, and on the basis of any one of the above embodiments, the cross-season heat storage pool 2 has a water supplementing pipeline 10, and the water supplementing pipeline 10 is provided with a variable-frequency constant-pressure water supplementing pump 11 and a water supplementing device 12, so as to supplement the water source for the cross-season heat storage pool 2.
In this embodiment, when the water level sensor 8 detects that the water level of the cross-season thermal storage water tank 2 is lower than the set value, a signal is transmitted to the variable-frequency constant-pressure water supplementing pump 11, the variable-frequency constant-pressure water supplementing pump 11 is started, and water of the water supplementing device 12 is pumped and conveyed into the cross-season thermal storage water tank 2 through the water supplementing pipeline 10, so that the water level in the cross-season thermal storage water tank 2 is ensured to meet the set value (the part is the water supplementing process of the cross-season thermal storage water tank 2).
The fourth embodiment of the present invention provides a cross-season water saving pool heat storage solar energy and water source heat pump coupled heating system, and on the basis of any one of the above embodiments, the solar hot water collector array 1 and the cross-season heat storage pool 2 have:
One end of the solar hot water collector water inlet pipeline 13 is communicated with the water inlet of the solar hot water collector array 1, the other end of the solar hot water collector water inlet pipeline is communicated with the cross-season heat storage water tank 2, two branch pipelines are arranged at the joint of the solar hot water collector water inlet pipeline 13 and the cross-season heat storage water tank 2, and one of the branch pipelines is provided with a normally open electromagnetic valve 14 so as to prevent ineffective heat collection of the solar hot water collector array 1 or frost cracking at night; the other branch pipeline is provided with a heat collection circulating pump 15 for conveying the water in the cross-season heat storage water tank 2 into the solar hot water type heat collector array 1 for heating;
one end of the water outlet pipeline 16 of the solar hot water type collector is communicated with the water outlet of the solar hot water type collector array 1, and the other end of the water outlet pipeline is communicated with the water inlet of the cross-season heat storage water tank 2 so as to convey the hot water heated by the solar hot water type collector to the cross-season heat storage water tank 2;
the solar hot water type collector water inlet pipeline 13 is provided with a collector water inlet temperature sensor 17 for monitoring the water inlet temperature of the solar hot water type collector array 1, and the solar hot water type collector water outlet pipeline 16 is provided with a collector water outlet temperature sensor 18 for monitoring the water outlet temperature of the solar hot water type collector array 1; and
An in-board temperature sensor 19 is arranged in the solar hot water type collector array 1 to monitor the temperature inside the solar hot water type collector array 1.
In this embodiment, the water inlet pipe 13 of the solar hot water collector is used for extracting water in the cross-season heat storage pool 2 and conveying the water into the solar hot water collector array 1 for heating, and the heated water is conveyed back into the cross-season heat storage pool 2 through the water outlet pipe 16 of the solar hot water collector, so that heating water circulation is completed (the process is a water conveying process between the solar hot water collector array 1 and the cross-season heat storage pool 2).
In addition, the collector inlet water temperature sensor 17 monitors the inlet water temperature of the solar hot water collector array 1, the collector outlet water temperature sensor 18 monitors the outlet water temperature of the solar hot water collector array 1, and the in-board temperature sensor 19 is used for monitoring the temperature in the solar hot water collector array 1.
The fifth embodiment of the present invention provides a cross-season water saving pool heat storage solar energy and water source heat pump coupled heating system, and on the basis of any one of the above embodiments, the cross-season heat storage pool 2 and the heating hot water heat exchanger group 3 have:
A water tank water outlet pipeline 20, one end of which is communicated with the cross-season heat storage water tank 2, and the other end of which is communicated with the first heating hot water heat exchanger 301, so as to convey water in the cross-season heat storage water tank 2 into the first heating hot water heat exchanger 301;
one end of the water tank water inlet pipeline 21 is communicated with the cross-season heat storage water tank 2, and the other end is communicated with the second heating hot water heat exchanger 302;
the water tank water outlet pipeline 20 is provided with a water tank water outlet temperature sensor 22 and a hot water heat exchange circulating pump 23, and the water tank water inlet pipeline 21 is provided with a water tank water inlet temperature sensor 24.
In the present embodiment, the tank water outlet line 20 is used to deliver water in the cross-season thermal storage tank 2 into the first heating hot water heat exchanger 301, and the tank water inlet line 21 is used to allow the cross-season thermal storage tank 2 to receive water from the second heating hot water heat exchanger 302 (this process is a water delivery process between the cross-season thermal storage tank 2 and the heating hot water heat exchanger group 3).
The sixth embodiment of the present invention proposes a cross-season water saving pool heat storage solar energy and water source heat pump coupled heating system, and on the basis of any one of the above embodiments, the first heating hot water heat exchanger 301 has:
the first heating hot water heat exchange water outlet pipeline 25 is communicated with the first heating hot water heat exchanger 301 at one end and the water source heat pump unit 5 at the other end, and the first heating hot water heat exchange water outlet pipeline 25 is communicated with the water supplementing pipeline 10 through a connecting pipeline 26;
The first heating hot water heat exchange water inlet pipeline 27, one end of which is communicated with the first heating hot water heat exchanger 301, and the other end of which is communicated with heating backwater; and
the first heating hot water heat exchange water outlet pipeline 25 is communicated with the first heating hot water heat exchange water inlet pipeline 27 through a communication pipeline 28;
wherein, the first heating hot water heat exchange water outlet pipeline 25 is sequentially provided with a first heating hot water heat exchange water outlet temperature sensor 29, a pressure sensor 30, a heating system circulating pump 31, a water source heat pump water inlet temperature sensor 32 and a flow sensor 33;
the first heating hot water heat exchange water inlet pipeline 27 is provided with a first heating hot water heat exchange water inlet temperature sensor 49 and a first electromagnetic valve 34; and
the communication line 28 is provided with a second solenoid valve 35.
In this embodiment, the first heating hot water heat exchange water outlet pipeline 25 is used for delivering water in the first heating hot water heat exchanger 301 to the water source heat pump unit 5, and during the delivering process, part of the water returns to the water replenishing pipeline 10 through the connecting pipeline 26. The first heating hot water heat exchange water inlet pipe 27 is used for conveying the heated backwater back into the first heating hot water heat exchanger 301.
The seventh embodiment of the present invention proposes a cross-season water saving pool heat storage solar energy and water source heat pump coupled heating system, and on the basis of any one of the above embodiments, the second heating hot water heat exchanger 302 has:
a second heating hot water heat exchange water outlet pipeline 36, one end of which is communicated with the second heating hot water heat exchanger 302, and the other end of which is communicated with the pressure-bearing closed hot water tank 4;
the second heating hot water heat exchange water inlet pipeline 37, one end of which is communicated with the second heating hot water heat exchanger 302, and the other end of which is communicated with the groundwater backwater and water source heat pump unit 5;
wherein, the second heating hot water heat exchange water outlet pipeline 36 is sequentially provided with a second heating hot water heat exchange water outlet temperature sensor 38 and a heating intermediate circulating pump 39;
the second heating hot water heat exchange water inlet pipe 37 is provided with a second heating hot water heat exchange water inlet temperature sensor 40, a third electromagnetic valve 41 and a fourth electromagnetic valve 42 in sequence.
In this embodiment, the second heating hot water heat exchange outlet pipeline 36 is used for conveying the water in the second heating hot water heat exchanger 302 to the pressure-bearing closed hot water tank 4 for heating, and then conveying the water to the water source heat pump unit 5 through the pressure-bearing closed hot water tank 4, and the water source heat pump unit 5 heats the user through the heating pipeline. The second heating hot water heat exchange water inlet pipe 37 is used for conveying backwater of the groundwater into the second heating hot water heat exchanger 302.
The eighth embodiment of the present invention provides a heat storage solar energy and water source heat pump coupled heating system for a cross-season water saving pool, and on the basis of any one of the above embodiments, the pressure-bearing closed hot water tank 4 further has:
a groundwater water intake pipe 43, one end of which is communicated with the pressure-bearing closed hot water tank 4, and the other end of which is communicated with groundwater water intake;
a water tank communication pipeline 44, one end of which is communicated with the pressure-bearing closed hot water tank 4, and the other end of which is communicated with the water source heat pump unit 5;
wherein, the groundwater extraction pipeline 43 is provided with a water source side water pump 45;
the water tank communication pipeline 44 is provided with a water tank outlet water temperature sensor 22;
a water temperature sensor 47 is arranged in the pressure-bearing closed hot water tank 4.
In the present embodiment, the groundwater intake pipe 43 is used for supplementing groundwater to the pressurized closed hot water tank 4 for heating, and the tank communication pipe 44 is used for delivering water in the pressurized closed hot water tank 4 into the water source heat pump unit 5.
A ninth embodiment of the present invention proposes a heat storage solar energy and water source heat pump coupled heating system across a season water saving pool, and on the basis of any one of the above embodiments, the heating pipeline 6 is provided with a heating water supply temperature sensor 48.
The tenth embodiment of the invention provides a cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating control method, which is applied to the cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system in any one of the technical schemes, and comprises the following steps:
starting and controlling the water source heat pump unit 5:
1.1 judging whether the water source heat pump unit 5 meets the starting requirement: setting the starting time point of the water source heat pump as T1 (the ground heating is started 1 hour in advance according to the use time of a user, and other heating modes are started 0.5 hour in advance), setting the stopping time point as T2 (the time when the user closes the heating), judging that the water source heat pump unit 5 reaches one of starting conditions when the time (namely the time when the system is required to operate) is between T1 and T2, and judging that the water source heat pump unit 5 completely reaches the starting condition if the water outlet temperature of the first heating hot water heat exchanger 31 is lower than 55 ℃ and the duration time is 60 s;
the system is provided with the following three-stage heating pipelines:
a first-stage heating pipeline, wherein the solar hot water type collector array 1 heats water in the cross-season heat storage water tank 2, the heated water is conveyed into the first heating hot water heat exchanger 301, at the moment, the heating intermediate circulation pump 39 is closed, the hot water is conveyed to the water source heat pump unit 5 (at the moment, the water source heat pump unit 5 does not work, namely the pipeline equivalent to the communication) through the first heating hot water heat exchanger 301, and then the water source heat pump unit 5 directly supplies the hot water to a user through the heating pipeline 6;
The water inlet of the low-grade end (the left side port of the water source heat pump unit in fig. 1) of the second-stage heat supply pipeline is the low-temperature water of the cross-season heat storage water tank 2, and the specific process is as follows: the low-temperature water of the cross-season heat storage water tank 2 enters the second heating hot water heat exchanger 302, the second heating hot water heat exchanger 302 conveys water to the pressure-bearing closed hot water tank 4 (at the moment, the heating intermediate circulation pump 39 is started), and then enters the water source heat pump unit 5 from the low-grade end water inlet of the water source heat pump unit 5. The water inlet at the high-grade end (the right side end of the water source heat pump unit in fig. 1) of the water source heat pump unit 5 is heating circulating water, and the specific process is as follows: the first electromagnetic valve 34 is closed, the second electromagnetic valve 35 is opened, and the heating circulating water enters the second half of the first heating hot water heat exchange water outlet pipeline 25 through the communication pipeline 26 and finally enters the water source heat pump unit 5 through the high-grade end (the right side port of the water source heat pump unit in fig. 1). The water source heat pump unit 5 draws the heat of the low-temperature water to supply the heat exchange of the heating circulating water, and the heating circulating water is supplied to a user through a heating pipeline 6 after being heated (namely, the grade of the heating circulating water is improved through the water source heat pump unit);
the third-stage heating pipeline is characterized in that the water inlet at the low-grade end (the left side port of the water source heat pump unit in fig. 1) of the water source heat pump unit 5 is groundwater, and the concrete process is as follows: the underground water intake pipeline 43 extracts underground water to the pressure-bearing closed hot water tank 4, and then enters the water source heat pump unit 5 through the low-grade end water inlet of the water source heat pump unit 5. The water inlet at the high-grade end (the right side end of the water source heat pump unit 5 in fig. 1) of the water source heat pump unit 5 is still heating circulating water, and the specific process is the same as that of the second-stage heating pipeline. The water source heat pump unit 5 is used for supplying heat to the heating circulating water for heat exchange by drawing heat of the groundwater, and the heating circulating water is supplied to users through the heating pipeline 6 after being heated (namely, the grade of the heating circulating water is improved through the water source heat pump unit).
It can be seen that when the system meets the requirement (hot water meets the heating requirement) and the first stage heating pipeline is started, the water source heat pump unit 5 is not required to be started at this time, and only when the second stage heating pipeline and the third stage heating pipeline are started, it is required to determine whether the water source heat pump unit meets the starting requirement, namely, the purpose of 1.1
1.2 when the water source heat pump unit 5 meets the starting condition, the unit operation is controlled to be increased or decreased according to the following requirements:
the flow sensor 33 of the first heating hot water heat exchange water outlet pipeline 25 and the water inlet temperature sensor 32 at the high-grade end of the water source heat pump are used for sampling and detecting the flow and the temperature of water; the temperature of the water is sampled and detected by the heating and water supply temperature sensor 48 of the heating pipe 6. Based on the three samples, heating load calculation is performed:
when the heating load demand is greater than the maximum load provided by the hot water unit and the duration of the state reaches 10-15 minutes, another water source heat pump is put in; when the calculation result shows that the maximum load provided by the residual unit after one water source heat pump is reduced can meet the load requirement, and the duration of the state reaches 10-15 minutes, one water source heat pump is stopped.
1.3 when the first heating hot water heat exchange outlet water temperature sensor 29 of the first heating hot water heat exchange outlet water pipeline 25 detects that the outlet water temperature is greater than 55 ℃ and the duration is 300S, the first electromagnetic valve 34 of the first heating hot water heat exchange inlet water pipeline 27 is opened, the second electromagnetic valve 35 of the communication pipeline 28 is closed, at the moment, the heating intermediate circulation pump 39 is closed, and the water source heat pump unit 5 is closed. At the moment, the heating heat required by the user is provided by the cross-season heat storage water tank, namely, a first-stage heating pipeline is started;
1.4 when the water outlet temperature sensor 22 of the water outlet pipeline of the water tank monitors that the water outlet temperature is less than 55 ℃ and the duration time is 300S, the second electromagnetic valve 35 is opened, the first electromagnetic valve 34 is closed, and in any case, the first electromagnetic valve 34 and the second electromagnetic valve 35 are not simultaneously opened or closed, and the water source heat pump unit 5 judges whether to start according to the requirement of 1.1;
second, control of the heat collection circulation pump 15 and the normally open electromagnetic valve 14:
setting the starting time point of the heat collection circulating pump 15 as T3 (0.5 hour after the local sunrise time is delayed), setting the stopping time point of the heat collection circulating pump 15 as T4 (0.5 hour in advance according to the local sunset time), wherein the time (namely the time required for the system to operate) is between T3 and T4, and when the temperature detected by the temperature sensor 19 in the board is greater than 55 ℃ and the duration is 300s, starting the heat collection circulating pump 15, and closing the normally open electromagnetic valve 14 after the time delay is 10 s;
When the time is between T3 and T4, the water inlet temperature sensor 17 of the heat collector detects that the water inlet temperature is higher than the water outlet temperature detected by the water outlet temperature sensor 18 of the heat collector, and the duration is 300s, the heat collection circulating pump 15 is closed, the normally open electromagnetic valve 14 is opened, and when the temperature detected by the temperature sensor in the plate is higher than 55 ℃ and the duration is 300s, the circulating water pump is started again;
when the time is longer than T4 or the temperature detected by the temperature sensor 19 in the plate is lower than 30 ℃, stopping the heat collection circulating pump 15, and opening the normally open electromagnetic valve 14, wherein the normally open electromagnetic valve 14 and the heat collection circulating pump 15 are in linkage reverse opening and closing, namely, the two are not opened at the same time or are not closed at the same time;
the frequency conversion of the heat collection circulating pump 15 is proportionally controlled according to the water supply and return temperature difference between the water outlet temperature sensor 18 of the heat collector and the water inlet temperature sensor 17 of the heat collector and the performance curve of the water pump.
Third, control of the variable-frequency constant-pressure water supplementing pump 11:
maintaining the pressure of the suction inlet of the circulating pump 31 of the heating system constant (monitored by the pressure sensor 30), and ensuring the water level of the heat storage water tank 2 across seasons according to the water level detected by the water tank liquid level sensor 8 (namely, supplementing water by the water supplementing device 12, wherein the water supplementing device 12 can be an external water supplementing pipeline 10 and the like, when the water level detected by the water tank liquid level sensor 8 is lower than a set value, the water tank liquid level sensor 8 transmits a signal to the variable-frequency constant-pressure water supplementing pump 11, and the variable-frequency constant-pressure water supplementing pump 11 starts water supplementing until the water level reaches the set value);
Fourth, control of the heating heat exchange circulating pump 23:
when the temperature monitored by the top temperature sensor 7 and the bottom temperature sensor 9 of the cross-season heat storage water tank 2 is higher than 30 ℃ and higher than 20 ℃, and the heating circulation pump 31 is already running, the heating heat exchange circulation pump 23 is started;
at this time, when the temperature monitored by the water inlet temperature sensor 24 of the cross-season heat storage pool is greater than the temperature monitored by the water outlet temperature sensor 22 of the water tank for 300 seconds, the hot water heat exchange circulating pump 23 is stopped; when the system meets the starting condition, the hot water heat exchange circulating pump 23 is restarted; the variable frequency of the hot water heat exchange circulating pump is proportionally controlled according to the difference value between the temperature monitored by the water tank inlet temperature sensor 24 and the temperature monitored by the water tank outlet temperature sensor 22 and the performance curve of the water pump;
fifth, control of the heating intermediate circulation pump 39:
when the time is between T1 and T2 and the first solenoid valve 34 is closed, the heating intermediate circulation pump 39 is started.
When the water supply temperature monitored by the second heating hot water heat exchange water outlet temperature sensor 38 is smaller than the water outlet temperature monitored by the pressure-bearing closed type hot water outlet temperature sensor 46, the duration is 300S; or stopping the heating intermediate circulation pump 39 when the temperature monitored by the water temperature sensor 47 in the pressure-bearing closed hot water tank 4 is lower than 20 ℃ and lasts for 60 seconds;
When the system satisfaction time is between T1 and T2 and the first solenoid valve 34 is closed, the heating intermediate circulation pump 39 is restarted; the frequency conversion of the heating intermediate circulating pump 39 is proportionally controlled according to the difference value between the temperature sensor 38 and the temperature sensor 46 and the performance curve of the water pump;
sixth, control of the water source side water pump 45:
when the temperature monitored by the water temperature sensor 47 in the pressure-bearing closed hot water tank 4 is lower than 20 ℃ and lasts for 60 seconds, the water source side water pump 45 is started, and meanwhile, the heating intermediate circulation pump 39 is closed; the third electromagnetic valve 41 is started and stopped in linkage with the heating intermediate circulation pump 39; the fourth electromagnetic valve 42 is started and stopped in linkage with the water source side water pump 45; the heating intermediate circulation pump 39 is not started at the same time as the water source side water pump 45.
In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. Cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system is characterized by comprising:
A solar hot water type collector array (1);
a cross-season heat storage water tank (2) communicated with the solar hot water type heat collector array (1);
the heating hot water heat exchanger group (3) is communicated with the cross-season heat storage water tank (2), wherein the heating hot water heat exchanger group (3) at least comprises a first heating hot water heat exchanger (301) and a second heating hot water heat exchanger (302) which are communicated with each other;
a pressure-bearing closed hot water tank (4) communicated with the second heating hot water heat exchanger (302) and a groundwater water intake system;
the water source heat pump unit (5) is provided with a low-grade end and a high-grade end, water inlet of the low-grade end is communicated with the pressure-bearing closed hot water tank (4), and water outlet is communicated with the switchable second heating hot water heat exchanger (302) or groundwater backwater; the water inlet of the high-grade end is communicated with the switchable first heating hot water heat exchanger (301) or heating backwater, and the water outlet is communicated with a heating pipeline (6) so as to provide heating hot water for a user;
the cross-season heat storage pool (2) and the heating hot water heat exchanger group (3) are provided with:
one end of the water tank water outlet pipeline (20) is communicated with the cross-season heat storage water tank (2), and the other end of the water tank water outlet pipeline is communicated with the first heating hot water heat exchanger (301) so as to convey water in the cross-season heat storage water tank (2) into the first heating hot water heat exchanger (301);
One end of the water tank water inlet pipeline (21) is communicated with the cross-season heat storage water tank (2), and the other end of the water tank water inlet pipeline is communicated with the second heating hot water heat exchanger (302);
the water tank water outlet pipeline (20) is provided with a water tank water outlet temperature sensor (22) and a hot water heat exchange circulating pump (23), and the water tank water inlet pipeline (21) is provided with a water tank water inlet temperature sensor (24);
the first heating hot water heat exchanger (301) has:
one end of the first heating hot water heat exchange water outlet pipeline (25) is communicated with the first heating hot water heat exchanger (301), the other end of the first heating hot water heat exchange water outlet pipeline is communicated with the high-grade end water inlet of the water source heat pump unit (5), and the first heating hot water heat exchange water outlet pipeline (25) is communicated with the water supplementing pipeline (10) through a connecting pipeline (26);
a first heating hot water heat exchange water inlet pipeline (27), one end of which is communicated with the first heating hot water heat exchanger (301) and the other end of which is communicated with heating backwater; and
the first heating hot water heat exchange water outlet pipeline (25) is communicated with the first heating hot water heat exchange water inlet pipeline (27) through a communication pipeline (28);
the first heating hot water heat exchange water outlet pipeline (25) is sequentially provided with a first heating hot water heat exchange water outlet temperature sensor (29), a pressure sensor (30), a heating system circulating pump (31), a water source heat pump water inlet temperature sensor (32) and a flow sensor (33);
The first heating hot water heat exchange water inlet pipeline (27) is provided with a first heating hot water heat exchange water inlet temperature sensor (49) and a first electromagnetic valve (34); and
the communication pipeline (28) is provided with a second electromagnetic valve (35);
the second heating hot water heat exchanger (302) has:
a second heating hot water heat exchange water outlet pipeline (36), one end of which is communicated with the second heating hot water heat exchanger (302) and the other end of which is communicated with the pressure-bearing closed hot water tank (4);
one end of the second heating hot water heat exchange water inlet pipeline (37) is communicated with the second heating hot water heat exchanger (302), and the other end is communicated with low-grade end water outlet of the water source heat pump unit (5);
wherein, the second heating hot water heat exchange water outlet pipeline (36) is sequentially provided with a second heating hot water heat exchange water outlet temperature sensor (38) and a heating intermediate circulating pump (39);
the second heating hot water heat exchange water inlet pipeline (37) is sequentially provided with a second heating hot water heat exchange water inlet temperature sensor (40) and a third electromagnetic valve (41).
2. The cross-season water-saving pool heat storage solar energy and water source heat pump coupling heating system according to claim 1, wherein a top temperature sensor (7) and a pool liquid level sensor (8) are arranged at the top of the cross-season heat storage pool (2), and a bottom temperature sensor (9) is arranged at the bottom of the cross-season heat storage pool.
3. The cross-season water-saving pool heat storage solar energy and water source heat pump coupled heating system according to claim 2, wherein the cross-season heat storage pool (2) is provided with a water supplementing pipeline (10), and the water supplementing pipeline (10) is provided with a variable-frequency constant-pressure water supplementing pump (11) and a water supplementing device (12) for supplementing a water source for the cross-season heat storage pool (2).
4. A cross-season water conservation pond thermal storage solar energy and water source heat pump coupled heating system according to claim 3, wherein the solar hot water type collector array (1) and the cross-season thermal storage pond (2) are provided with:
one end of the solar hot water collector water inlet pipeline (13) is communicated with the water inlet of the solar hot water collector array (1), the other end of the solar hot water collector water inlet pipeline is communicated with the cross-season heat storage water tank (2), two branch pipelines are arranged at the joint of the solar hot water collector water inlet pipeline (13) and the cross-season heat storage water tank (2), and one of the branch pipelines is provided with a normally open electromagnetic valve (14) so as to prevent ineffective heat collection of the solar hot water collector array (1) or frost cracking at night; the other branch pipeline is provided with a heat collection circulating pump (15) so as to convey the water in the cross-season heat storage water tank (2) into the solar hot water type heat collector array (1) for heating;
One end of a water outlet pipeline (16) of the solar hot water collector is communicated with a water outlet of the solar hot water collector array (1), and the other end of the water outlet pipeline is communicated with a water inlet of the cross-season heat storage pool (2) so as to convey hot water heated by the solar hot water collector to the cross-season heat storage pool (2);
the solar hot water type collector water inlet pipeline (13) is provided with a collector water inlet temperature sensor (17) for monitoring the water inlet temperature of the solar hot water type collector array (1), and the solar hot water type collector water outlet pipeline (16) is provided with a collector water outlet temperature sensor (18) for monitoring the water outlet temperature of the solar hot water type collector array (1); and
an in-board temperature sensor (19) is arranged in the solar hot water type heat collector array (1) so as to monitor the internal temperature of the solar hot water type heat collector array (1).
5. The cross-season water conservation pond heat storage solar energy and water source heat pump coupled heating system according to claim 4, wherein the pressure-bearing closed hot water tank (4) further comprises:
one end of the groundwater water intake pipeline (43) is communicated with the pressure-bearing closed hot water tank (4), and the other end is communicated with groundwater water intake;
one end of the water tank communication pipeline (44) is communicated with the pressure-bearing closed hot water tank (4), and the other end of the water tank communication pipeline is communicated with the low-grade end water inlet of the water source heat pump unit (5);
Wherein, the underground water intake pipeline (43) is provided with a water source side water pump (45);
the water tank communication pipeline (44) is provided with a pressure-bearing closed type hot water outlet temperature sensor (46);
a water temperature sensor (47) is arranged in the pressure-bearing closed hot water tank (4).
6. The cross-season water conservation pond heat storage solar energy and water source heat pump coupling heating system according to claim 5, wherein the heating pipeline (6) is provided with a heating water supply temperature sensor (48).
7. The method for controlling the cross-season water-saving pool heat storage solar energy and water source heat pump coupled heating is applied to the cross-season water-saving pool heat storage solar energy and water source heat pump coupled heating system disclosed by the claim 6, and is characterized by comprising the following steps:
starting and controlling the water source heat pump unit (5):
1.1 judging whether the water source heat pump unit (5) meets the starting requirement: setting the starting time point of the water source heat pump as T1, the stopping time point as T2, judging that the water source heat pump unit (5) reaches one of starting conditions when the time is between T1 and T2, and judging that the water source heat pump unit (5) completely reaches the starting condition if the water outlet temperature of the first heating hot water heat exchanger (301) is lower than 55 ℃ and the duration time is 60 s;
1.2 when the water source heat pump unit (5) meets the starting condition, the unit operation is controlled to be increased or decreased according to the following requirements:
the flow rate and the inlet water temperature of the hot water are sampled and detected through a flow sensor (33) of a first heating hot water heat exchange water outlet pipeline (25) and a temperature sensor (32) of the inlet water at the high-grade end of the water source heat pump; the water outlet temperature of the hot water is sampled and detected by a heating and water supply temperature sensor (48) of a heating pipeline (6), and heating load calculation is performed based on the three samples:
when the heating load demand is greater than the maximum load provided by the hot water unit and the duration of the state reaches 10-15 minutes, another water source heat pump is put in; when the calculation result shows that the maximum load provided by the residual unit after one water source heat pump is reduced can meet the load requirement, and the duration of the state reaches 10-15 minutes, one water source heat pump is stopped;
1.3 when a first heating hot water heat exchange water outlet temperature sensor (29) of a first heating hot water heat exchange water outlet pipeline (25) monitors that the water outlet temperature is higher than 55 ℃ and the duration is 300S, a first electromagnetic valve (34) of a first heating hot water heat exchange water inlet pipeline (27) is opened, a second electromagnetic valve (35) of a communication pipeline (28) is closed, a heating intermediate circulation pump (39) is closed, a water source heat pump unit (5) is closed, and heating heat required by a user is provided by a cross-season heat storage pool (2);
1.4 when the water outlet temperature sensor (22) of the water outlet pipeline (20) of the water tank monitors that the water outlet temperature is less than 55 ℃ and the duration is 300S, the second electromagnetic valve (35) is opened, the first electromagnetic valve (34) is closed, and under any condition, the first electromagnetic valve (34) and the second electromagnetic valve (35) are not simultaneously opened or closed, and the water source heat pump unit (5) judges whether to start according to the requirement of 1.1;
secondly, controlling a heat collection circulating pump (15) and a normally open electromagnetic valve (14):
setting the starting time point of the heat collection circulating pump (15) as T3, the stopping time point of the heat collection circulating pump (15) as T4, when the time is between T3 and T4, the temperature detected by the temperature sensor (19) in the plate is more than 55 ℃, when the duration time is 300s, the heat collection circulating pump (15) is started, and the normally open electromagnetic valve (14) is closed after the time is delayed for 10 s;
when the time is between T3 and T4, the water inlet temperature of the heat collector is higher than the water outlet temperature of the heat collector detected by the water outlet temperature sensor (18) by the water inlet temperature sensor (17), and the duration time is 300s, the heat collection circulating pump (15) is closed, the normally open electromagnetic valve (14) is opened, and the starting condition is waited to be met, and then the circulating water pump is started;
when the time is longer than T4 or the temperature detected by the temperature sensor (19) in the plate is lower than 30 ℃, stopping the heat collection circulating pump (15), and opening the normally open electromagnetic valve (14), wherein the normally open electromagnetic valve (14) is in linkage reverse opening and closing with the heat collection circulating pump (15);
The variable frequency of the heat collection circulating pump (15) is controlled according to the water supply and return temperature difference between a water outlet temperature sensor (18) of the heat collector and a water inlet temperature sensor (17) of the heat collector;
third, control of the frequency conversion constant pressure water supplementing pump (11):
maintaining the pressure of the suction inlet of the circulating pump (31) of the heating system to be constant, and ensuring the water level of the heat storage water tank (2) in a cross-season mode according to the water level detected by the water level sensor (8) of the water tank;
fourthly, controlling a heating heat exchange circulating pump:
when the temperature monitored by the top temperature sensor (7) and the bottom temperature sensor (9) of the cross-season heat storage water tank (2) is higher than 30 ℃ and higher than 20 ℃, the hot water heat exchange circulating pump (23) is started when the heating system circulating pump (31) is already operated;
at the moment, when the temperature monitored by the water inlet temperature sensor (24) of the cross-season heat storage pool (2) is higher than the temperature monitored by the water outlet temperature sensor (22) of the water tank and lasts for 300 seconds, the hot water heat exchange circulating pump (23) is stopped; when the system meets the starting condition, the hot water heat exchange circulating pump (23) is restarted; the variable frequency of the hot water heat exchange circulating pump (23) is controlled according to the size proportion of the difference value between the water outlet temperature sensor (22) and the water inlet temperature sensor (24) of the water tank;
fifth, control of the heating intermediate circulation pump (39):
When the time is between T1 and T2 and the first electromagnetic valve (34) is closed, the heating intermediate circulation pump (39) is started;
when the water supply temperature monitored by the second heating hot water heat exchange water outlet temperature sensor (38) is smaller than the water outlet temperature monitored by the pressure-bearing closed hot water outlet temperature sensor (46), the duration is 300S; or stopping the heating intermediate circulation pump (39) when the temperature monitored by the water temperature sensor (47) in the pressure-bearing closed hot water tank (4) is lower than 20 ℃ and lasts for 60 seconds;
restarting the heating intermediate circulation pump (39) when the system meets the starting condition; the frequency conversion of the heating intermediate circulating pump (39) is controlled according to the difference value between the temperature sensor (38) and the temperature sensor (46);
sixth, control of the water source side water pump (45):
when the temperature monitored by a water temperature sensor (47) in the pressure-bearing closed hot water tank (4) is lower than 20 ℃ and lasts for 60 seconds, a water source side water pump (45) is started, and a heating intermediate circulation pump (39) is closed; the third electromagnetic valve (41) is started and stopped in linkage with the heating intermediate circulating pump (39); the fourth electromagnetic valve (42) is interlocked with the water source side water pump (45); the heating intermediate circulation pump (39) is started up at a different time from the water source side water pump (45).
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